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. 2024 Dec 18;11(1):e41370. doi: 10.1016/j.heliyon.2024.e41370

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© 2024 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 4 — Flow diagram and directions in 12 different case studies - (a): Spiral Coil 1 is paired with a finned tube. (b): Spiral Coil 2 and a finned tube. (c): Spiral Coil 3 and a finned tube. (d): Spiral Coil 1 & 2 in series configuration and a finned tube. (e): Spiral Coil 2 & 3 in series configuration and a finned tube. (f): Spiral Coil 1 & 3 in series configuration and a finned tube. (g): Spiral Coil 1 & 2 in parallel configuration and a finned tube. (h): Spiral Coil 2 & 3 in parallel configuration and a finned. (i): Spiral Coil 1 & 3 in parallel configuration and a finned tube tube. (j): Spiral Coil 1, 2 & 3 in series configuration and a finned tube. (k): Spiral Coil 1, 2 & 3 in series configuration without a finned tube. (l): Spiral Coil 1, 2 & 3 in parallel configuration and a finned tube.